Leh is capital of ladakh kargil region.if u want to go to leh the best time is when sindhu darshan is on.its accessible by air and also by road via srinagar or rohtang pass.
places to visit:leh palace , numerous gompas, stok museum gurudwara patthar sahib, japanese peace memorial khardungla pass, chinese border where u can shake hands and get photographed with chinese troops.
you can stay at many lodges that provide accommodation to backpackers.food in leh is expensive.if u know some local people better stay at their place as u can have warm hospitality and authentic tibetan meals like momos and yak milk.
the scenery in leh is stunning with its vertical cliffs and roaring indus and warm sulphur springs.u can see moon lighting the barren mountains. its a must visit place.
on the other hand low oxygen can make u sick and direct sunlight will leave u with sunburns.take some tan lotion.
avoid hippies on drug trail with pseudo spirituality on their lips.that is ur typical bored westerners.